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Sprint Goals
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Specification | Value | ||||
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Shocks from MSXIV | Spring Force: https://www.ridefox.com/family.php?m=bike&family=floatx2 | ||||
Chassis and Suspension Geometry |
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Mass of Vehicle | 192kg | ||||
Center of Gravity Location |  | ||||
Loading Conditions |  | ||||
Assembly Max Height | Cannot Final bellcrank, clevis, and pushrod assembly exceed 100mm past top or bottom chassis membermembers. |
Timeline
Note that independent reviews with fellow leads throughout this entire period are encouraged! You are not limited to just the scheduled reviews!!!
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Conceptual Design: Sketches of design concepts, with labels and descriptions where needed to effectively communicate design ideas.
Force analysis: Using the diagram of force locations on the model car above, find the center of mass/gravity (CG) for the vehicle, use the CG to determine the load distribution between axles, use the load distribution to find out how much load each independent suspension assembly needs to withstand, calculate how much load each component in your design undergoes based on the front left independent suspension load force.
Off the Shelf Part Selection: Ensure that your sketches and designs include what types of off the shelf (OTS) parts you would like to use (e.g. You want to join two components together without welding? What type of fastener will it be? Will you use a pin? Shoulder Bolt? Zip tie?). In Phase 1, the selection process does not need to be specific (diameter, thread length, head type, etc.), but these factors should be considered when designing.
Detailed Design: Concepts should be finalized at this point and moved into CAD. An accurate model containing all properly dimensioned components and OTS parts should be drafted (to be done in SolidWorks). Ensure proper modelling techniques are used, each component is a different part, proper naming of each component, properly mated assemblies, CAD files/mock replacements for OTS parts. The final CAD model should look exactly how it is expected to look in real life.
Material Selection: Each component should have a material assigned to it based on the requirements of your design. Use past experiences and intuition to select materials for a component (e.g. glass shouldn’t be used as the chassis material of a car because it will shatter upon impact) and refer to the material’s properties to make an accurate selection.
Resources to help with material selection: https://www.engineeringtoolbox.com/material-properties-t_24.html, http://www.matweb.com/
Manufacturing Method: How will your part be made? Consider the tools we have in the bay and in the machine shop. Will this part need to be outsourced for manufacture? Ensure you determine one or more methods of manufacture (waterjetting, CNC Mill, injection mould, etc.) for each component.
Refined OTS Part Selection: With your OTS parts selected, it is time to specify the exact parts you need for your design to work (with safety factors included). Use websites and catalogues to determine what exists out there and try to select a cost effective part for your design. Try to be consistent and use standard sizes where possible (e.g. A bolt size M6.789 is very specific and unlikely to find, try designing with M8 instead). For example, say you want to fasten two brackets together using a nut and bolt:
Refined Bolt Specifications: Bolt size, bolt material, tensile strength, shear strength, grade (needs to comply with ASC 2024 regs), etc.
Refined Nut Specifications: Nut size (should fit on bolt), nut material, grade (needs to comply with ASC 2024 regs), etc.
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